Sony VGNSR590F - Manual (Page 127)

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Precautions >
Safety Information
❑ If you are not using your computer for an extended period of time, remove the battery pack from the computer to prevent
damage to the battery pack.
❑ If you have not used the battery pack for a considerable amount of time, the remaining battery life may become short.
This is normal and does not indicate a malfunction. The battery pack will gradually discharge over time even while not in
use. Connect the AC adapter to your computer and recharge the battery pack before using the computer again.